168516316853 has 2 divisors, whose sum is σ = 168516316854. Its totient is φ = 168516316852.

The previous prime is 168516316799. The next prime is 168516316861. The reversal of 168516316853 is 358613615861.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 114107488804 + 54408828049 = 337798^2 + 233257^2 .

It is a cyclic number.

It is not a de Polignac number, because 168516316853 - 2¹⁸ = 168516054709 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 168516316795 and 168516316804.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (168516316153) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 84258158426 + 84258158427.

It is an arithmetic number, because the mean of its divisors is an integer number (84258158427).

Almost surely, 2^168516316853 is an apocalyptic number.

It is an amenable number.

168516316853 is a deficient number, since it is larger than the sum of its proper divisors (1).

168516316853 is an equidigital number, since it uses as much as digits as its factorization.

168516316853 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3110400, while the sum is 53.

The spelling of 168516316853 in words is "one hundred sixty-eight billion, five hundred sixteen million, three hundred sixteen thousand, eight hundred fifty-three".